Far too many to name (attempted below). Looney Tunes was probably my first cartoon though. Used to watch it every night at 8 before bed.
Let's see...
TMNT
Chip & Dale Rescue Rangers
Centurions
Duck Tales
Alvin and the Chipmunks
Johnny Quest
The Adventures of T-Rex
Sonic The Hedgehog (both of them)
David the Gnome (hated that show but it was always on and so watched)
Noozles
Inspector Gadget (watched it so much referred to him as Uncle Gadget at one point)
Animaniacs (I still do a Wakko impression every chance I get)
Tiny Toons
Doug
Ah! Real Monsters
Rugrats
Darkwing Duck
Tailspin
Digimon
Snorks
a hell of a lot of Hanna Barbara toons
Garfield
Heathcliff
Batman
X-Men
Pokemon (when it aired at 6 in the morning and was all sparkily and new)
Gargoyles
Ren and Stimpy (used to freak me out but started reading John K's blog where he goes into detail how each scene was animated. Fascinating stuff.)
The Little Prince
Hmm, that's about it off the top of my head.
Actually discovered Ulysses 31 pretty recently while searching for a cartoon I couldn't remember the name of. I LOVE the intro song.